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Flashcards in Chapter 5: Electrical Energy Fundamentals Deck (37)
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1

A(n) ____ is the smallest particle of an element.

Atom

2

Protons

The positively charged particles in the nucleus of an atom

3

Neutrons

Particles with no charge in the nucleus of an atom

4

Electrons

Negatively charged particles that orbit the nucleus of an atom

5

In some types of matter, electrons are tightly bound to the nucleus and travel only with great difficulty. In other types of matter, the bond is so relaxed that moving is easy. These easy-moving electrons are called ______.

Free electrons

6

Conductor

A material which conducts electricity well because it has a lot of free electrons

7

Insulator

A material that doesn't conduct electricity well because it has only a few free electrons, or none at all

8

Current

The flow of electrons from a body with a high electron count to a body with a low electron count.

9

Equilibrium

When two bodies have an equal number of electrons

10

Electrical potential

The ability to provide free electrons

11

Differences in electrical potential are measured in _____.

Volts

12

Direct current (dc)

 

A current which only flows in one direction

13

Alternating current (ac)

Continuously reverses the direction of its flow

14

Hertz

Cycles per second

15

What is the standard ac current in the US measured in hertz?

60 Hz

16

A basic chemical device for providing electrical power is the _____.

Voltaic cell

17

Anode

The positive pole in a voltaic cell

18

Cathode

The negative pole in a voltaic cell

19

In a voltaic cell, an acid solution serves as the ______, the chemical solution or medium that allows for the flow of electrons between the anode and cathode.

Electrolyte

20

Battery

A group of voltaic cells

21

Wet cell battery

Uses a liquid chemical as an electrolyte

22

Dry cell battery

Uses a somewhat dry chemical paste for its electrolyte

23

Generator

Uses mechanical energy to create differences in electrical potential between two electrical poles

24

Amperage (I)

The rate of the flow of current

25

Ampere (A)

The unit used to measure current

26

The equipment where electricity enters a house is usually rated at how many amps?

100 A or 200 A

27

Electromotive force (E or emf)

The pressure (electrical potential) that moves electrons through a conductor

28

What is the unit of measure for electromotive force?

Volt (V)

29

Most residential wiring is rated at how many volts?

120 V and 240 V

30

Resistance (R)

The opposition to the flow of electrons through a conductor, similar to friction